class Boost < Formula
  desc "Collection of portable C++ source libraries"
  homepage "https://www.boost.org/"
  url "https://boostorg.jfrog.io/artifactory/main/release/1.80.0/source/boost_1_80_0.tar.bz2"
  sha256 "1e19565d82e43bc59209a168f5ac899d3ba471d55c7610c677d4ccf2c9c500c0"
  license "BSL-1.0"
  head "https://github.com/boostorg/boost.git", branch: "master"

  livecheck do
    url "https://www.boost.org/users/download/"
    regex(/href=.*?boost[._-]v?(\d+(?:[._]\d+)+)\.t/i)
    strategy :page_match do |page, regex|
      page.scan(regex).map { |match| match.first.tr("_", ".") }
    end
  end

  bottle do
    sha256 cellar: :any,                 arm64_ventura:  "aa3d546bc5fd86a73ed3019e7dd1b04bda025798bd43d99e643f1114cbfef558"
    sha256 cellar: :any,                 arm64_monterey: "147b71e637f2ab396c580f62f8a16917010efa4494be26d6ec4a3339f980087f"
    sha256 cellar: :any,                 arm64_big_sur:  "572093eec4c68d13f95b3682e2c673a2610097bae1912ab4d6e2b2b857ef9122"
    sha256 cellar: :any,                 ventura:        "9fd4dfa222b28d6972ef3c60648972122e9491c4e4c74b436871bb0646a670d7"
    sha256 cellar: :any,                 monterey:       "cc487497f5beaa3726ed3e8772e8066e968ad494917b35c58c94f9e5febc7944"
    sha256 cellar: :any,                 big_sur:        "35c01f163d0d54afc7cdf2b492245fb34d64faf42ac410d1c77d211f00789f14"
    sha256 cellar: :any,                 catalina:       "a75afcf9ab1eee0eecb59282070b0559c56b7a00d5b3ab29c6a2d52c9b51b8a5"
    sha256 cellar: :any_skip_relocation, x86_64_linux:   "6d54fe09e3343863c9b2e7ba034ad2eaa2fce83651cc338da59e2895bbea0034"
  end

  depends_on "icu4c"
  depends_on "xz"
  depends_on "zstd"

  uses_from_macos "bzip2"
  uses_from_macos "zlib"

  def install
    # Force boost to compile with the desired compiler
    open("user-config.jam", "a") do |file|
      if OS.mac?
        file.write "using darwin : : #{ENV.cxx} ;\n"
      else
        file.write "using gcc : : #{ENV.cxx} ;\n"
      end
    end

    # libdir should be set by --prefix but isn't
    icu4c_prefix = Formula["icu4c"].opt_prefix
    bootstrap_args = %W[
      --prefix=#{prefix}
      --libdir=#{lib}
      --with-icu=#{icu4c_prefix}
    ]

    # Handle libraries that will not be built.
    without_libraries = ["python", "mpi"]

    # Boost.Log cannot be built using Apple GCC at the moment. Disabled
    # on such systems.
    without_libraries << "log" if ENV.compiler == :gcc

    bootstrap_args << "--without-libraries=#{without_libraries.join(",")}"

    # layout should be synchronized with boost-python and boost-mpi
    args = %W[
      --prefix=#{prefix}
      --libdir=#{lib}
      -d2
      -j#{ENV.make_jobs}
      --layout=tagged-1.66
      --user-config=user-config.jam
      install
      threading=multi,single
      link=shared,static
    ]

    # Boost is using "clang++ -x c" to select C compiler which breaks C++14
    # handling using ENV.cxx14. Using "cxxflags" and "linkflags" still works.
    args << "cxxflags=-std=c++14"
    args << "cxxflags=-stdlib=libc++" << "linkflags=-stdlib=libc++" if ENV.compiler == :clang

    system "./bootstrap.sh", *bootstrap_args
    system "./b2", "headers"
    system "./b2", *args
  end

  test do
    (testpath/"test.cpp").write <<~EOS
      #include <boost/algorithm/string.hpp>
      #include <boost/iostreams/device/array.hpp>
      #include <boost/iostreams/device/back_inserter.hpp>
      #include <boost/iostreams/filter/zstd.hpp>
      #include <boost/iostreams/filtering_stream.hpp>
      #include <boost/iostreams/stream.hpp>

      #include <string>
      #include <iostream>
      #include <vector>
      #include <assert.h>

      using namespace boost::algorithm;
      using namespace boost::iostreams;
      using namespace std;

      int main()
      {
        string str("a,b");
        vector<string> strVec;
        split(strVec, str, is_any_of(","));
        assert(strVec.size()==2);
        assert(strVec[0]=="a");
        assert(strVec[1]=="b");

        // Test boost::iostreams::zstd_compressor() linking
        std::vector<char> v;
        back_insert_device<std::vector<char>> snk{v};
        filtering_ostream os;
        os.push(zstd_compressor());
        os.push(snk);
        os << "Boost" << std::flush;
        os.pop();

        array_source src{v.data(), v.size()};
        filtering_istream is;
        is.push(zstd_decompressor());
        is.push(src);
        std::string s;
        is >> s;

        assert(s == "Boost");

        return 0;
      }
    EOS
    system ENV.cxx, "test.cpp", "-std=c++14", "-o", "test", "-L#{lib}", "-lboost_iostreams",
                    "-L#{Formula["zstd"].opt_lib}", "-lzstd"
    system "./test"
  end
end